St. Clair County, Missouri ZIP Codes

6 ZIP Codes

Zip Code
City
Population ↓
64776Osceola3,374
64724Appleton City1,999
64763Lowry City1,676
64738Collins1,368
64780Rockville364
64781Roscoe80

Overview of ZIP Codes in St. Clair County

ZCTAs are geographic areas created by the US Census Bureau to approximate the delivery areas of ZIP Codes for statistical analysis. While ZCTAs use the same five-digit codes as ZIP Codes, they represent defined geographic areas that may not exactly match the mail delivery routes of ZIP Codes.
6
ZIP Codes

The data shown reflect ZCTAs from the US Census. As of 2025, there are 6 ZCTAs in St. Clair County, Missouri (US Census).

Sources

  1. US Census: 2025 Gazetteer Files
  2. US Census: ZIP Code Tabulation Areas (ZCTAs)

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